MESON Chess Problem Database

Problem Display
PID: 201943 (2n5/2Pk3p/pr1P3r/2Q4N/1p6/1B6/4R3/3R1K2 w - - 0 1)

Rains, Cyril George

The Observer, 1950

(First published on Sun Jan 22 1950)

2n5/2Pk3p/pr1P3r/2Q4N/1p6/1B6/4R3/3R1K2

#2

8 + 7

15239 Valois Notebooks 2020

SOLUTION

  • SOUND
  • Sets
    • 1...Rbxd6
      • 2.Ba4#
    • 1...Rhxd6
      • 2.Sf6#
    • 1...Rf6+
      • 2.Sxf6#
    • 1...Sxd6
      • 2.c8Q#
  • Tries
    • 1.Ba4+?
      • 1...Rc6
        • 2.Bxc6#
        • 2.Qxc6#
      • 1...Rb5!
    • 1.Be6+?
      • 1...Ke8
        • 2.d7#
      • 1...Rxe6!
  • Keys
    • 1.Re8!
      • threat
        • 2.Rd8#
      • 1...Rf6+
        • 2.Sxf6#
      • 1...Kxe8
        • 2.d7#
      • 1...Rbxd6
        • 2.Ba4#
      • 1...Rhxd6
        • 2.Sf6#
      • 1...Sxd6
        • 2.c8Q#

FEATURES

  • Static
    • TYPE = THREAT
    • CHANGED MATES = 0
    • ADDED MATES = 1
    • REMOVED MATES = 0
  • Sets
    • R(c);N_GUARD,P_SPINR(c),XP(G)::B(D)
    • R(d);N_GUARD,P_SPINR(d),XP(G)::S(F)
    • R(d);CHECK,N_GUARD::S(F),XR(d)
    • S(g);OGATE,P_SPINS(g),XP(G)::P=Q
  • Tries
    • Try
      • B(D);CHECK
      • Refutation
        • R(c);P_SPINR(c)
    • Try
      • B(D);CHECK
      • Vars
        • K(e);OGATE,S_FLIGHT::P(G)
      • Refutation
        • R(d);XB(D)
  • Actual
    • R(C);
    • Threat
      • R1(C)
    • Vars
      • R(d);CHECK,N_GUARD::S(F),XR(d)
      • K(e);OGATE,S_FLIGHT,XR(C)::P(G)
      • R(c);N_GUARD,P_SPINR(c),XP(G)::B(D)
      • R(d);N_GUARD,P_SPINR(d),XP(G)::S(F)
      • S(g);OGATE,P_SPINS(g),XP(G)::P=Q
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